Use JSON-LD link if found for HTML injection

[webb-ben]

Overview

Use JSON-LD link if found during link creation to render JSON-LD in default HTML templates. For requests that require a parameter like EDR, pygeoapi throws an error when trying to inject the JSON-LD to the HTML template because it does not include the necessary query arguments. This PR updates the behavior such that if a JSON-LD link is found, it is then subsequently used to fetch the json-ld that is injected because it will contain the additional query arguments to fetch the appropriate url.

Related Issue / discussion

#859
cgs-earth/RISE-EDR-Mappings#16

Additional information

Dependency policy (RFC2)

• I have ensured that this PR meets RFC2 requirements

Updates to public demo

• I have ensured that breaking changes to the pygeoapi master demo server have been addressed
  • https://github.com/geopython/demo.pygeoapi.io/blob/master/services/pygeoapi_master/local.config.yml

Contributions and licensing

(as per https://github.com/geopython/pygeoapi/blob/master/CONTRIBUTING.md#contributions-and-licensing)

• I'd like to contribute [feature X|bugfix Y|docs|something else] to pygeoapi. I confirm that my contributions to pygeoapi will be compatible with the pygeoapi license guidelines at the time of contribution
• I have already previously agreed to the pygeoapi Contributions and Licensing Guidelines